Cloudy; ashen (4)
I believe the answer is:
grey
I believe this is a double definition.
'cloudy' is the first definition.
(similar in meaning)
'ashen' is the second definition.
(I've seen this before)
(Other definitions for grey that I've seen before include "Ashen" , "Colour; dull and nondescript" , "Unclear (area); dull (weather)" , "Nondescript; overcast (sky)" , "showing his age?" .)